Vacuum tank



D. D. LEVY VACUUM TANK Jun 2, 1931.

Filed Deo. 29, 1927 v ad Patented June 2, 1931 'leraren STATES DUDLEY D.LEVY, F NEW YORK, N. Y., ASSIGNOR TO DUDLEY RESEARCH CORPORA- TION, OFNEW YORK, N. Y., A CORPORATION GF NEW' YORK I VACUUM TANK Applicationled December 29, 1927. Serialv No. 243,363.

rIhis invention relates to valve construction for tanks and inparticular for vacuum tanks.

The object of my invention includes the provision of a simple butreliable and eicient construction whereby a certain reserve supply ofliquid is always assured in the tank and a new supply of liquidis addedwhen the reserve supply has droppped to a` predetermined level.

Another object includes the provision of a liquid supply valveconstruction of few parts for controlling the liquid supply. I alsoprovide a simple liquid equalizing valve l and means to operate saidvalve' in unison withthe supply valve. y

Other objects will appear hereinafter and I obtain these objects by theconstruction shown in the accompanying drawings in 11G which- A Figure 1is a view, partly in section, of a tank to which my invention is appliedFig. y2 is a view takenr on the line 2 2 looking in the direction of thearrows, but showing in dotted lines the relative location of the liquidequalizing valve and the liquid outlet in the partition and in the'bottom of the tank; and V Fig. 3 is a view showing the liquid supply 3Gvalve and the liquid equalizing valve in opposite positions from thatshown in Fig. 1, that is, the former valve is'in closed position. Thesame numerals of reference refer to .l like parts in the several views.y 35 Referring now to the accompanying drawings wherein I have shown apreferred form of construction, but to which I do not wish to beunderstood as having limited myself eX- cept as set forth in theappended claims. I

" provide a closed tank 10 lwhich is divided by a partition 11 into anupper or liquid supply chamber 12 and a lower liquid reservoir orconstant feed chamber 13. The partition 11 is provided with a port 14which is closed by 45 a valve 15 in the manner described more fullybelow.

The upper or liquid supply chamber 12 is provided with three boresthrough the outer wall thereof; bore 16 is, in practice, connected 50 toa liquid supply (not shown). Bore 17 is suitably connected to an exhaustor suction device (not shown) and bore 18 opensto the atmosphere. Thesebores are properly lo.- cated so as to be controlled by the beet-likeend 19 of the liquid supply valve 2O when said valve is caused tooscillate-on pivot 21 between stops 22 andv 23. A iioat 24 is supportedon a pivot 25 by arm 26. This arm has an extension 27 on which isfastened one end of spring 28. rlhe other end of spring 28 is fastenedat 29 to the leg of valve 20. It will be observed that the point 29swings about the pivot point 25 as the float lowers or rises due to thefall'and'rise of the liquid in the tank. In the position shown in F ig.1 the suction port 17 and the liquid supplying port 16 are closed byvalve member 20. If now the level of the liquid falls and lowers thefloat arm, extension 27 will swing towards and over thepivot point 21until the tension of spring 28 snaps over thevalve 2O into liquidsupplying position (shown in Fig.

Port-s 16 and 17 are now uncovered while port 18 is closed and liquidiiows into tle upper or supply chamber.

When valve 2O snaps into the liquid supplying position spring 30, whichconnects point 29 with stem 31 on the valves 2() and 15 respectively, isput under tension sufficient to close valve 15, which causes the liquidlevel in the supply tank to rise. As the float rises it also moves thearmA extension 27 to the liquid cut-off position (shown in Fig. 1) andthus closes the liquid supply and the exhaust ports. When this happensthe tension on spring is decreased and valve 15 opens and permits theliquid in the supply tank to replenish the liquid supply in thereservoir 13. An outlet 40 at any suitable position in the bottom of thereservoir affords means for connecting a liquidcondueting tube (notshown) tov place of use, as for example to a carbureter.

A. suitable pipe 41 open to the atmosphere equalizes the pressure on theliquid within' I supplying chamber 12 operates intermittently toreplenish said reservoir as and when needed.

let as it is needed and this iiow is substan# tially at a constantpressure.

Having now described my invention, what I claim as new and useful anddesirel to secure by Letters Patent is:

l. In a liquid supplying tank, a partition to divide said tank into, aliquid receiving chamber and a liquid storing chamber, a valve in saidpartition for maintaining a constant liquid supply in said storingchamber,

. said receiving chamber having an air port,

a suction port and a liquid supply port extending through the Walls ofsaid chamber and a valve in said receiving chamberto cover and uncoversaid ports for intermittent-ly rcplenisliing the liquid in said tank.

2. In a liquid supplying tank, a partition to divide said tank into aliquid receiving chamber and a liquid storing chamber, a valve includingVa hinged member on said partition, said receiving Chamber having anairy port, a suction port and a liquid supply port, a valve in saidreceiving chamber to cover and uncover said ports for intermittentlyreplenishing the liquid in'said tank, and means for closing the firstmentioned valve when the liquid supply and suction ports are opened.

3. vacuum tank comprising aY liquid supply chamber having a liquidsupply port, an air port and an exhaust port, in combination with anL-shaped valve member pi-votally mounted adjacent said ports and servingto selectively cover andunoover said ports, and means to actuate saidvalve, in-

cluding a iioat and a resilient member, as the float rises and falls.

4. A vacuum tank comprising a liquidsupplychamber having a liquid supplyport, an air port and an exhaust port, in combination with an L-shapedvalve member pivotally mounted adjacent said' ports and serving toselectively cover and uncover `said ports, means to operatesaidL-sliaped valvemember At the same time the liquid is free to' flow froma reservoir through thev liquid outhinged flap valve in said partition,said re- 6. In a liquid supplying tank, a partition to divide said tankinto 'a liquid receiving chamber and a liquid .storing chamber, a flapserving as a valve hinged on said partition," said receiving chamberhaving a liquid supplying port, an air port and a suction port and avalve member for selectively covering or uncovering said ports and meanscontrolled by said valve member for opening said flap. l

7. In a vacuum tank, a partition to divide said tank into a liquidreceiving chamber and a liquid storing chamber, a valve in saidpartition for maintaining a constant liquid supply in said storingchamber, Vmeans for venting said storing chamber, said receiving chamberhaving an air port and liquid supply and suction ports, and aboot-shaped valve to alternately cover said air port and said liquidvsupply and suction ports with 'what corresponds to the heel and entirefoot portions thereof, respectively, to intermittently open said portsto maintain the level of the V liquid in the receiving chamber constant.

8. In a vacuum tank, a partition to divide saidrtank into a liquidreceiving chamber and a liquid storing chamber, a valve in saidpartition forvmaintaining a constant liquidV supply in saidstoringchamber, means for venting said' storing chamber, said receiving'chamber having any air, port and liquid supply .and suction ports, aboot-shaped valve to alternately cover-said air port and said liquidsupply and suction ports with what corresponds to the heel and entirefoot portion-s thereof, respectively, to intermittently open said portsto maintain the level of the liquid inthe receiving chamber constant,a-nd means connecting the valve-voffsaid partiti-on with the boot-shapedvalve sethat the valve iiik for covering and uncovering said ports, a Y

second valve anda resilient connection kbe- Vtw'een said valves wherebyysaid second valve is closed and opened inresponse to oscillationso saidport controlling valve.

